问题描述: 七年级数学题,进来看下题目,求帮助啊 1个回答 分类:数学 2014-11-20 问题解答: 我来补答 (你的题目是否有点错误呢,应该是(xy-2)²吧)因为∣x-1∣+(xy-2)²=0,所以x-1=0且xy-2=0有x-1=0解得x=1,所以y=21/xy+1/(x+1)(y+1)+1/(x+2)(y+2)+……+1/(x+2006)(y+2006)=1/(1×2)+1/(2×3)+1/(3×4)+……+1/(2007×2008)=1-1/2+1/2-1/3+1/3-1/4+……+1/2007-1/2008=1-1/2008=2007/2008 展开全文阅读